:root {
    --bg: #070d12;
    --surface: #122030;
    --surface-hover: #1a2c42;
    --accent: #f97316;
    --accent-hover: #ea580c;
    --accent2: #38bdf8;
    --text: #f0f8ff;
    --muted: #8fa5b8;
    --border: rgba(143, 165, 184, 0.2);
    --font-heading: 'Oswald', sans-serif;
    --font-body: 'Fira Sans', sans-serif;
    --transition: all 0.3s ease;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  body {
    font-family: var(--font-body);
    background-color: var(--bg);
    color: var(--muted);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }
  h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--text);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    line-height: 1.2;
  }
  a { color: var(--accent2); text-decoration: none; transition: var(--transition); }
  a:hover { color: var(--accent); }
  img { max-width: 100%; height: auto; display: block; }

  .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }

  /* Buttons */
  .btn {
    display: inline-flex; justify-content: center; align-items: center;
    padding: 12px 24px; font-family: var(--font-heading); font-size: 16px;
    font-weight: 500; text-transform: uppercase; letter-spacing: 1px;
    border-radius: 2px; cursor: pointer; transition: var(--transition);
    min-height: 44px; text-decoration: none; border: 1px solid transparent;
  }
  .btn-primary { background-color: var(--accent); color: #fff; }
  .btn-primary:hover { background-color: var(--accent-hover); box-shadow: 0 0 15px rgba(249, 115, 22, 0.4); color: #fff; }
  .btn-secondary { background-color: transparent; color: var(--text); border-color: var(--border); }
  .btn-secondary:hover { border-color: var(--text); background-color: rgba(240, 248, 255, 0.05); color: var(--text); }

  /* Header Styles (Matching Homepage constraints) */
  header { background-color: var(--surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
  .nav-container { display: flex; justify-content: space-between; align-items: center; height: 70px; }
  .brand { font-family: var(--font-heading); font-size: 28px; font-weight: 700; color: var(--accent); text-transform: uppercase; display: flex; align-items: center; gap: 10px; }
  .nav-links { display: none; gap: 24px; }
  .nav-links a { color: var(--text); font-weight: 500; font-size: 15px; text-transform: uppercase; font-family: var(--font-heading); letter-spacing: 0.5px; }
  .nav-links a:hover { color: var(--accent); }
  .nav-actions { display: none; gap: 12px; }
  .menu-toggle { display: block; background: none; border: none; color: var(--text); font-size: 24px; cursor: pointer; padding: 10px; min-width: 44px; min-height: 44px; }
  .mobile-menu { display: none; background-color: var(--surface); border-bottom: 1px solid var(--border); padding: 20px; flex-direction: column; gap: 15px; }
  .mobile-menu.active { display: flex; }
  .mobile-menu a { color: var(--text); font-weight: 500; font-size: 16px; padding: 10px 0; border-bottom: 1px solid var(--border); }
  .mobile-menu a:last-child { border-bottom: none; }
  .mobile-menu .btn { margin-top: 10px; border-bottom: none; padding: 12px; }

  @media (min-width: 1024px) {
    .nav-links { display: flex; }
    .nav-actions { display: flex; }
    .menu-toggle { display: none; }
    .mobile-menu { display: none !important; }
  }

  /* Hero Section - Terminal Style */
  .hero {
    padding: 60px 0 40px;
    background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
  }
  .hero::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
    background: linear-gradient(90deg, transparent, var(--accent2), transparent);
    opacity: 0.5;
  }
  .breadcrumb {
    font-family: var(--font-body); font-size: 14px; color: var(--muted);
    margin-bottom: 20px; display: flex; align-items: center; gap: 8px;
  }
  .breadcrumb a { color: var(--muted); }
  .breadcrumb a:hover { color: var(--accent2); }
  .hero h1 {
    font-size: 32px; color: var(--text); margin-bottom: 24px;
    position: relative; display: inline-block;
  }
  .hero h1::after {
    content: '_'; color: var(--accent); animation: blink 1s step-end infinite;
  }
  @keyframes blink { 50% { opacity: 0; } }
  .meta-chips { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 20px; }
  .chip {
    background: rgba(56, 189, 248, 0.1); border: 1px solid rgba(56, 189, 248, 0.3);
    color: var(--accent2); padding: 6px 12px; font-size: 13px; font-family: monospace;
    border-radius: 2px; display: flex; align-items: center; gap: 6px;
  }
  .chip::before { content: '>'; color: var(--accent); font-weight: bold; }

  /* Main Content Area */
  .content-wrapper { padding: 50px 0; display: grid; gap: 40px; }

  /* System Readout (Intro) */
  .system-readout {
    background-color: var(--surface);
    border-left: 4px solid var(--accent);
    padding: 24px;
    font-size: 17px;
    color: var(--text);
    box-shadow: inset 0 0 20px rgba(0,0,0,0.5);
    position: relative;
  }
  .system-readout::before {
    content: 'SYS.INFO //'; font-family: monospace; font-size: 12px;
    color: var(--muted); position: absolute; top: 8px; right: 12px;
  }

  /* Content Sections */
  .section-block h2 {
    font-size: 24px; color: var(--accent2); margin-bottom: 20px;
    display: flex; align-items: center; gap: 10px;
  }
  .section-block h2::before {
    content: ''; display: block; width: 12px; height: 12px;
    background-color: var(--accent); clip-path: polygon(0 0, 100% 50%, 0 100%);
  }
  .section-block p { margin-bottom: 16px; font-size: 16px; }
  .section-block p:last-child { margin-bottom: 0; }
  .section-block a { border-bottom: 1px dashed var(--accent2); }
  .section-block a:hover { border-bottom-style: solid; }

  /* Data Display Diagram (for Section 2) */
  .data-display {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px;
    margin: 24px 0; background: var(--surface); padding: 20px;
    border: 1px solid var(--border); border-radius: 4px;
  }
  .data-cell {
    background: var(--bg); border: 1px solid var(--border);
    padding: 15px; text-align: center; display: flex; flex-direction: column; gap: 8px;
    position: relative; overflow: hidden;
  }
  .data-cell::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 2px;
    background: var(--muted); opacity: 0.3;
  }
  .data-cell:nth-child(2)::before { background: var(--accent); opacity: 1; box-shadow: 0 0 10px var(--accent); } /* Highlighting Kop = 5 based on text */
  .data-cell .label { font-family: var(--font-heading); font-size: 14px; color: var(--muted); letter-spacing: 1px; }
  .data-cell .value { font-family: monospace; font-size: 32px; color: var(--text); font-weight: bold; }
  .data-cell:nth-child(2) .value { color: var(--accent); }

  /* Terminal List */
  .terminal-list { list-style: none; margin: 20px 0; padding: 0; }
  .terminal-list li {
    position: relative; padding-left: 24px; margin-bottom: 12px; color: var(--text);
  }
  .terminal-list li::before {
    content: '■'; position: absolute; left: 0; top: 2px;
    color: var(--accent); font-size: 12px;
  }

  /* FAQ Section */
  .faq-section { margin-top: 20px; }
  .faq-item {
    background-color: var(--surface); border: 1px solid var(--border);
    margin-bottom: 12px; border-radius: 2px;
  }
  .faq-item summary {
    padding: 18px 20px; font-family: var(--font-heading); font-size: 18px;
    color: var(--text); cursor: pointer; list-style: none;
    display: flex; justify-content: space-between; align-items: center;
    text-transform: uppercase; letter-spacing: 0.5px;
  }
  .faq-item summary::-webkit-details-marker { display: none; }
  .faq-item summary::after {
    content: '+'; color: var(--accent2); font-size: 24px; font-weight: 300; transition: transform 0.3s;
  }
  .faq-item[open] summary::after { transform: rotate(45deg); color: var(--accent); }
  .faq-item p {
    padding: 0 20px 20px; margin: 0; color: var(--muted); border-top: 1px solid rgba(255,255,255,0.05); padding-top: 15px;
  }

  /* Related Pages Module */
  .related-module {
    background: linear-gradient(135deg, var(--surface) 0%, #0d1824 100%);
    border: 1px solid var(--accent2); padding: 30px; margin-top: 40px;
    position: relative;
  }
  .related-module::before {
    content: 'DIR.LINK //'; position: absolute; top: -10px; left: 20px;
    background: var(--bg); padding: 0 10px; font-family: monospace;
    color: var(--accent2); font-size: 12px;
  }
  .related-grid { display: grid; gap: 15px; margin-top: 20px; }
  .related-card {
    display: block; padding: 15px 20px; background: rgba(0,0,0,0.3);
    border: 1px solid var(--border); color: var(--text);
    font-family: var(--font-heading); text-transform: uppercase; letter-spacing: 1px;
    display: flex; justify-content: space-between; align-items: center;
  }
  .related-card:hover { background: rgba(56, 189, 248, 0.1); border-color: var(--accent2); color: var(--accent2); }
  .related-card::after { content: '→'; font-family: monospace; opacity: 0.5; }
  .related-card:hover::after { opacity: 1; color: var(--accent); }

  /* CTA Block */
  .cta-block {
    background: var(--surface); border: 1px solid var(--border);
    padding: 50px 30px; text-align: center; margin-top: 40px;
    position: relative; overflow: hidden;
  }
  .cta-block::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 4px;
    background: var(--accent);
  }
  .cta-block h3 { font-size: 28px; margin-bottom: 15px; color: var(--text); }
  .cta-block p { color: var(--muted); margin-bottom: 30px; font-size: 16px; max-width: 600px; margin-inline: auto; }
  .cta-actions { display: flex; gap: 15px; justify-content: center; flex-wrap: wrap; }

  /* Footer Styles (Matching Homepage constraints) */
  footer { background-color: var(--surface); border-top: 1px solid var(--border); padding: 60px 0 30px; margin-top: 60px; text-align: center; }
  .footer-brand { font-family: var(--font-heading); font-size: 32px; font-weight: 700; color: var(--accent); text-transform: uppercase; margin-bottom: 15px; }
  .footer-tagline { color: var(--muted); margin-bottom: 30px; font-size: 15px; max-width: 600px; margin-inline: auto; }
  .footer-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 15px 25px; margin-bottom: 40px; }
  .footer-links a { color: var(--text); font-size: 14px; text-transform: uppercase; font-family: var(--font-heading); letter-spacing: 0.5px; }
  .footer-links a:hover { color: var(--accent); }
  .copyright { color: var(--muted); font-size: 13px; border-top: 1px solid var(--border); padding-top: 20px; }

  /* Media Queries */
  @media (min-width: 768px) {
    .hero h1 { font-size: 42px; }
    .data-display { grid-template-columns: repeat(4, 1fr); }
    .related-grid { grid-template-columns: repeat(3, 1fr); }
    .cta-block { padding: 60px; }
  }
  @media (min-width: 1024px) {
    .content-wrapper { grid-template-columns: 8fr 4fr; }
    .main-article { grid-column: 1 / -1; max-width: 900px; margin: 0 auto; }
  }


/* pipeline image & layout guards */
html, body { overflow-x: clip; }
img { max-width: 100%; height: auto; }
img.site-logo { height: 40px; width: auto; max-width: 240px; object-fit: contain; flex: none; }
header .logo a { display: inline-flex; align-items: center; flex: none; text-decoration: none; }
img.hero-visual { width: 100%; max-width: 560px; height: auto; object-fit: cover; border-radius: 16px; display: block; margin-inline: auto; }
img[class^="strip-"], img[class*=" strip-"] { width: 100%; height: auto; display: block; border-radius: 12px; object-fit: cover; }
/* 合规声明块（zb-disclaimer，全站 footer） */
.zb-disclaimer { margin-top: 18px !important; padding: 14px 0 0 0 !important; border-top: 1px solid rgba(128,128,128,.25) !important; font-size: .72rem !important; line-height: 1.7 !important; opacity: .85 !important; display: block !important; text-align: left !important; width: 100% !important; clear: both !important; }
.zb-disclaimer .zb-18 { display: inline-block !important; padding: 2px 10px !important; border: 1.5px solid currentColor !important; border-radius: 6px !important; font-weight: 800 !important; letter-spacing: 1px !important; margin: 0 0 10px 0 !important; font-size: .78rem !important; }
.zb-disclaimer p { display: block !important; margin: 5px 0 !important; padding: 0 !important; color: inherit !important; font-size: .72rem !important; line-height: 1.7 !important; }
.zb-disclaimer p:last-child { margin-bottom: 0 !important; }